CN203274875U - CAN bus based automobile axle weight detecting instrument - Google Patents
CAN bus based automobile axle weight detecting instrument Download PDFInfo
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- CN203274875U CN203274875U CN 201320117967 CN201320117967U CN203274875U CN 203274875 U CN203274875 U CN 203274875U CN 201320117967 CN201320117967 CN 201320117967 CN 201320117967 U CN201320117967 U CN 201320117967U CN 203274875 U CN203274875 U CN 203274875U
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- automobile axle
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Abstract
The utility model discloses a CAN bus based automobile axle weight detecting instrument. The detecting instrument comprises a weighing sensor, a signal processing module, an A/D converter, a single chip microcomputer, a watchdog circuit, a key module, a display module, a CAN communication controller and a CAN bus, wherein the weighing sensor, the signal processing module, the A/D converter and the single chip microcomputer are sequentially connected, the single chip microcomputer is connected with the watchdog circuit, the display module, the key module and the CAN communication controller, and the CAN communication controller is connected with the CAN bus at the same time. Axle weight information of a vehicle passing by is acquired through the weighing sensor, the collected axle weight information is processed by the signal processing module and the A/D converter and transmitted to the single chip microcomputer, the single chip microcomputer transmits corresponding information to an upper computer through the CAN communication controller and the CAN bus, the information can also be displayed through the display module, and corresponding display items are selected through the key module. The automobile axle weight detecting instrument is supplemented by the watchdog circuit, and a system is ensured to be able to reset automatically after encountering an accident.
Description
Technical field
The utility model relates to a kind of automobile axle load detector, relates in particular to a kind of automobile axle load detector based on the CAN bus.
Background technology
Automobile overload operation has at present caused great potential safety hazard to China's traffic safety, because China is vast in territory, traffic environment differs greatly, and automobile overload is difficult to investigation, this has brought great inconvenience for traffic police's work, and therefore solving the automobile overload problem is problem extremely urgent in traffic control.
For the problem of above appearance, China's traffic control system adopts the method for artificial investigation to solve basically.The automobile axle load detector is that automobile detects one of must indispensable equipment, and the automobile detection apparatus of a new generation to adopt fieldbus to control with data transmission be trend of the times.Therefore, we select, and the most widely used CAN line is improved the automobile axle load detector of having succeeded in developing in vehicle electronics, makes its interface function with CAN bus, adopts the communication standard of CAN bus to carry out data transmission.
Summary of the invention
The purpose of this utility model is, a kind of automobile axle load detector based on the CAN bus is provided.
This detector adopts the CAN bus design of being used widely measuring instrument of new generation on vehicle electronics on the basis of original automobile axle load detector.The application of CAN bus has improved anti-interference and the data transmission capabilities of instrument, is well suited for using at the vehicle testing line of inclement condition.
In order to realize above-mentioned task, the utility model adopts following technical solution to be achieved:
A kind of automobile axle load detector based on the CAN bus, it is characterized in that, this detector comprises LOAD CELLS, signal processing module, A/D converter, single-chip microcomputer, " house dog " circuit, key-press module, display module, CAN communication controller, CAN bus, wherein, LOAD CELLS, signal processing module, A/D converter, single-chip microcomputer connect successively, single-chip microcomputer is connected with " house dog " circuit, display module, key-press module, CAN communication controller respectively again, and the CAN communication controller is connected with the CAN bus simultaneously.
The utility model also comprises following other technologies feature:
Described LOAD CELLS adopts Tedea3410 single-point type LOAD CELLS.
Described A/D converter adopts the ICL7135A/D converter.
Described single-chip microcomputer adopts the AT89C52 single-chip microcomputer.
Described CAN communication controler is the SJA1000 communication controler.
The utility model obtains to weigh information by the axle of vehicle by LOAD CELLS, the heavy information of axle that collects is passed to single-chip microcomputer, single-chip microcomputer is delivered to host computer by CAN communication controller and CAN bus with corresponding information, also information exchange can be crossed display module shows, select corresponding display items display by key-press module, and being aided with " house dog " circuit, the assurance system can automatically reset after running into accident.This detector has that reliability is high, real-time good and the characteristics such as strong interference immunity, has satisfied modern vehicle detection line practical application needs, has ensured the safety of driving.
Description of drawings
Fig. 1 is system architecture connection layout of the present utility model;
Be described in further detail of the present utility model below in conjunction with drawings and Examples.
Embodiment
Fig. 1 is structure connection layout of the present utility model, this detector comprises LOAD CELLS, signal processing module, A/D converter, single-chip microcomputer, " house dog " circuit, key-press module, display module, CAN communication controller, CAN bus, wherein, LOAD CELLS, signal processing module, A/D converter, single-chip microcomputer connect successively, single-chip microcomputer is connected with " house dog " circuit, display module, key-press module, CAN communication controller respectively again, and the CAN communication controller is connected with the CAN bus simultaneously.When Vehicle Driving Cycle passed through LOAD CELLS, LOAD CELLS obtained the heavy information of axle by vehicle, after processing by signal processing module and A/D converter, the axle that collects is weighed information pass to single-chip microcomputer.Single-chip microcomputer carries out initialization to SJA1000, determine work dominant frequency, baud rate, output characteristics of SJA1000 etc., adopt the mode of interrupting to obtain analog-to-digital sampled value, this value is directly shown at the scene by display module, can select corresponding display items display by key-press module, and be sent on the CAN bus by SJA1000.The information of coming from the CAN bus also adopts the mode of interruption to receive, reading information and be sent to the scene in interrupt service routine.This detector is aided with " house dog " circuit simultaneously, and the assurance system can automatically reset after running into accident.
Vehicle Driving Cycle is during by described LOAD CELLS, sensor is stressed, produce very faint electric signal, be about 0～20mV, this small signal simulation voltage can not satisfy the input voltage of A/D converter requirement, therefore before carrying out the A/D conversion, the signal of LOAD CELLS need to be amplified to 0～2V by signal processing module.Signal processing module of the present utility model adopts the OP07 amplifier to amplify, the principal character of this amplifier is gain and common-mode rejection ratio very high (being generally 100dB), and its offset voltage and offset current, temperature is floated and noise is very little, can satisfy the requirement of described ICL7135A/D converter.
Described key-press module adopts the design of three buttons: function key, increase key and reduce key.It is mainly used to arrange calibration value, controlling value, communications parameter of instrument etc.Display module adopts the light-emitting diode display of 4 super brightness, and all section route selection is connected in parallel, and is controlled by 8 I/O mouth, adopts the mode of dynamic scan to show.The information such as model, weighing data, operation indicating and error code that can on-the-spot Displaying Meter.
Described CAN communication controler adopts the SJA1000 of PHILIPS company, and it is high integration CAN controller, have many main structures, bus access right of priority, in groups with broadcasting packet and hardware filtering function.The internal storage of SJA1000 can be videoed and is that the external data memory of AT89C52, AD0～AD7 are the P0 mouth that the address date multiplexing line of 8 is connected to AT89C52.
In addition, for the reliability of installing, increased " house dog " circuit in the utility model, when the turning on and off of power supply, when instantaneous supply voltage shakiness causes system in case of system halt, misoperation and is subject to strong jamming, " house dog " circuit can recover its state automatically.
Claims (5)
1. automobile axle load detector based on the CAN bus, it is characterized in that, this detector comprises LOAD CELLS, signal processing module, A/D converter, single-chip microcomputer, " house dog " circuit, key-press module, display module, CAN communication controller, CAN bus, wherein, LOAD CELLS, signal processing module, A/D converter, single-chip microcomputer connect successively, single-chip microcomputer is connected with " house dog " circuit, display module, key-press module, CAN communication controller respectively again, and the CAN communication controller is connected with the CAN bus simultaneously.
2. a kind of automobile axle load measuring instrument based on the CAN bus as claimed in claim 1, is characterized in that, described single-chip microcomputer adopts the AT89C52 single-chip microcomputer.
3. a kind of automobile axle load measuring instrument based on the CAN bus as claimed in claim 1, is characterized in that, described LOAD CELLS adopts Tedea3410 single-point type LOAD CELLS.
4. a kind of automobile axle load measuring instrument based on the CAN bus as claimed in claim 1, is characterized in that, described CAN communication controler is the SJA1000 communication controler.
5. a kind of automobile axle load measuring instrument based on the CAN bus as claimed in claim 1, is characterized in that, described A/D converter adopts the ICL7135A/D converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320117967 CN203274875U (en) | 2013-03-06 | 2013-03-06 | CAN bus based automobile axle weight detecting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320117967 CN203274875U (en) | 2013-03-06 | 2013-03-06 | CAN bus based automobile axle weight detecting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203274875U true CN203274875U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320117967 Expired - Fee Related CN203274875U (en) | 2013-03-06 | 2013-03-06 | CAN bus based automobile axle weight detecting instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN203274875U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104210445A (en) * | 2014-04-29 | 2014-12-17 | 长安大学 | Heavy goods vehicle ramp running safety monitoring system |
| CN105865705A (en) * | 2016-03-31 | 2016-08-17 | 西安法士特汽车传动有限公司 | CAN communication pressure sensor |
-
2013
- 2013-03-06 CN CN 201320117967 patent/CN203274875U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104210445A (en) * | 2014-04-29 | 2014-12-17 | 长安大学 | Heavy goods vehicle ramp running safety monitoring system |
| CN104210445B (en) * | 2014-04-29 | 2016-02-24 | 长安大学 | A kind of heavy wrecker truck ramp operation safety monitoring system |
| CN105865705A (en) * | 2016-03-31 | 2016-08-17 | 西安法士特汽车传动有限公司 | CAN communication pressure sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20140306 |